In this study, water-processed LiNi_0.5Mn_0.3Co_0.2O₂ cathodes (NMC532) are investigated. Notably, corrosion of aluminum current collector occurring in aqueous processing owing to alkalinity of NMC slurry is avoided through addition of phosphoric acid which buffers the slurry pH, or by using a carbon-coated collector. The impact of small amounts of phosphoric acid on the electrochemical performance is evaluated in half-cells, and the best formulations are selected to perform further ageing tests in pouch cells. In particular, post mortem analyses such as electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy are conducted on the cathodes after long-term cycling in Li-ion cells to fully understand the enhanced cycling stability observed with H₃PO₄-containing water-based cathode. These analyses allow to conclude on the influence of the binder, the current collector, and the aqueous immersion of the NMC532 powder.

在这项研究中，水处理的LiNi _0.5 Mn _0.3 Co _0.2 O ₂阴极（NMC532）进行了研究。值得注意的是，通过添加缓冲浆料pH的磷酸或通过使用碳涂覆的集电器，避免了由于NMC浆料的碱度而在水处理中发生的铝集电器的腐蚀。在半电池中评估了少量磷酸对电化学性能的影响，并选择了最佳配方以在袋式电池中进行进一步的老化测试。特别是，在锂离子电池中长期循环后，对阴极进行验尸分析，例如电化学阻抗谱和X射线光电子能谱，以充分了解H ₃ PO ₄观察到的增强的循环稳定性。含水的阴极。这些分析可以推断出粘合剂，集电器和NMC532粉末在水浸中的影响。